in6_proto.c revision 1.103.4.10
1 /* $NetBSD: in6_proto.c,v 1.103.4.10 2017/08/28 17:53:12 skrll Exp $ */ 2 /* $KAME: in6_proto.c,v 1.66 2000/10/10 15:35:47 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: in6_proto.c,v 1.103.4.10 2017/08/28 17:53:12 skrll Exp $"); 66 67 #ifdef _KERNEL_OPT 68 #include "opt_gateway.h" 69 #include "opt_inet.h" 70 #include "opt_ipsec.h" 71 #include "opt_dccp.h" 72 #include "opt_sctp.h" 73 #endif 74 75 #include <sys/param.h> 76 #include <sys/socket.h> 77 #include <sys/protosw.h> 78 #include <sys/kernel.h> 79 #include <sys/domain.h> 80 #include <sys/mbuf.h> 81 82 #include <net/if.h> 83 84 #include <netinet/in.h> 85 #include <netinet/in_systm.h> 86 #include <netinet/in_var.h> 87 #include <netinet/ip_encap.h> 88 #include <netinet/ip.h> 89 #include <netinet/ip_var.h> 90 #include <netinet/in_pcb.h> 91 #include <netinet/ip6.h> 92 #include <netinet6/ip6_var.h> 93 #include <netinet/icmp6.h> 94 #include <netinet6/in6_pcb.h> 95 96 #include <netinet/tcp.h> 97 #include <netinet/tcp_fsm.h> 98 #include <netinet/tcp_seq.h> 99 #include <netinet/tcp_timer.h> 100 #include <netinet/tcp_var.h> 101 #include <netinet/tcpip.h> 102 #include <netinet/tcp_debug.h> 103 104 #include <netinet6/udp6.h> 105 #include <netinet6/udp6_var.h> 106 107 #ifdef DCCP 108 #include <netinet/dccp.h> 109 #include <netinet/dccp_var.h> 110 #include <netinet6/dccp6_var.h> 111 #endif 112 113 #ifdef SCTP 114 #include <netinet/sctp_pcb.h> 115 #include <netinet/sctp.h> 116 #include <netinet/sctp_var.h> 117 #include <netinet6/sctp6_var.h> 118 #endif 119 120 #include <netinet6/pim6_var.h> 121 122 #ifdef IPSEC 123 #include <netipsec/ipsec.h> 124 #include <netipsec/ipsec6.h> 125 #include <netipsec/key.h> 126 #endif /* IPSEC */ 127 128 129 #include "carp.h" 130 #if NCARP > 0 131 #include <netinet/ip_carp.h> 132 #endif 133 134 #include "etherip.h" 135 #if NETHERIP > 0 136 #include <netinet6/ip6_etherip.h> 137 #endif 138 139 #include <netinet6/ip6protosw.h> 140 141 #include <net/net_osdep.h> 142 143 /* 144 * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. 145 */ 146 147 DOMAIN_DEFINE(inet6domain); /* forward declare and add to link set */ 148 149 /* Wrappers to acquire kernel_lock. */ 150 151 PR_WRAP_CTLINPUT(rip6_ctlinput) 152 PR_WRAP_CTLINPUT(encap6_ctlinput) 153 PR_WRAP_CTLINPUT(udp6_ctlinput) 154 PR_WRAP_CTLINPUT(tcp6_ctlinput) 155 156 #define rip6_ctlinput rip6_ctlinput_wrapper 157 #define encap6_ctlinput encap6_ctlinput_wrapper 158 #define udp6_ctlinput udp6_ctlinput_wrapper 159 #define tcp6_ctlinput tcp6_ctlinput_wrapper 160 161 PR_WRAP_CTLOUTPUT(rip6_ctloutput) 162 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 163 PR_WRAP_CTLOUTPUT(udp6_ctloutput) 164 PR_WRAP_CTLOUTPUT(icmp6_ctloutput) 165 166 #define rip6_ctloutput rip6_ctloutput_wrapper 167 #define tcp_ctloutput tcp_ctloutput_wrapper 168 #define udp6_ctloutput udp6_ctloutput_wrapper 169 #define icmp6_ctloutput icmp6_ctloutput_wrapper 170 171 #if defined(DCCP) 172 PR_WRAP_CTLINPUT(dccp6_ctlinput) 173 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 174 175 #define dccp6_ctlinput dccp6_ctlinput_wrapper 176 #define dccp_ctloutput dccp_ctloutput_wrapper 177 #endif 178 179 #if defined(SCTP) 180 PR_WRAP_CTLINPUT(sctp6_ctlinput) 181 PR_WRAP_CTLOUTPUT(sctp_ctloutput) 182 183 #define sctp6_ctlinput sctp6_ctlinput_wrapper 184 #define sctp_ctloutput sctp_ctloutput_wrapper 185 #endif 186 187 #if defined(IPSEC) 188 189 #ifdef IPSEC_RUMPKERNEL 190 /* 191 * .pr_input = ipsec6_common_input won't be resolved on loading 192 * the ipsec shared library. We need a wrapper anyway. 193 */ 194 static int 195 ipsec6_common_input_wrapper(struct mbuf **mp, int *offp, int proto) 196 { 197 198 if (ipsec_enabled) { 199 return ipsec6_common_input(mp, offp, proto); 200 } else { 201 m_freem(*mp); 202 return IPPROTO_DONE; 203 } 204 } 205 #define ipsec6_common_input ipsec6_common_input_wrapper 206 207 /* The ctlinput functions may not be loaded */ 208 #define IPSEC_WRAP_CTLINPUT(name) \ 209 static void * \ 210 name##_wrapper(int a, const struct sockaddr *b, void *c)\ 211 { \ 212 void *rv; \ 213 KERNEL_LOCK(1, NULL); \ 214 if (ipsec_enabled) \ 215 rv = name(a, b, c); \ 216 else \ 217 rv = NULL; \ 218 KERNEL_UNLOCK_ONE(NULL); \ 219 return rv; \ 220 } 221 IPSEC_WRAP_CTLINPUT(ah6_ctlinput) 222 IPSEC_WRAP_CTLINPUT(esp6_ctlinput) 223 224 #else /* !IPSEC_RUMPKERNEL */ 225 226 PR_WRAP_CTLINPUT(ah6_ctlinput) 227 PR_WRAP_CTLINPUT(esp6_ctlinput) 228 229 #endif /* !IPSEC_RUMPKERNEL */ 230 231 #define ah6_ctlinput ah6_ctlinput_wrapper 232 #define esp6_ctlinput esp6_ctlinput_wrapper 233 234 #endif /* IPSEC */ 235 236 static void 237 tcp6_init(void) 238 { 239 240 icmp6_mtudisc_callback_register(tcp6_mtudisc_callback); 241 242 tcp_init_common(sizeof(struct ip6_hdr)); 243 } 244 245 const struct ip6protosw inet6sw[] = { 246 { .pr_domain = &inet6domain, 247 .pr_protocol = IPPROTO_IPV6, 248 .pr_init = ip6_init, 249 .pr_fasttimo = frag6_fasttimo, 250 .pr_slowtimo = frag6_slowtimo, 251 .pr_drain = frag6_drainstub, 252 }, 253 { .pr_type = SOCK_RAW, 254 .pr_domain = &inet6domain, 255 .pr_protocol = IPPROTO_ICMPV6, 256 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 257 .pr_input = icmp6_input, 258 .pr_ctlinput = rip6_ctlinput, 259 .pr_ctloutput = icmp6_ctloutput, 260 .pr_usrreqs = &rip6_usrreqs, 261 .pr_init = icmp6_init, 262 }, 263 { .pr_type = SOCK_DGRAM, 264 .pr_domain = &inet6domain, 265 .pr_protocol = IPPROTO_UDP, 266 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 267 .pr_input = udp6_input, 268 .pr_ctlinput = udp6_ctlinput, 269 .pr_ctloutput = udp6_ctloutput, 270 .pr_usrreqs = &udp6_usrreqs, 271 .pr_init = udp6_init, 272 }, 273 { .pr_type = SOCK_STREAM, 274 .pr_domain = &inet6domain, 275 .pr_protocol = IPPROTO_TCP, 276 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 277 .pr_input = tcp6_input, 278 .pr_ctlinput = tcp6_ctlinput, 279 .pr_ctloutput = tcp_ctloutput, 280 .pr_usrreqs = &tcp_usrreqs, 281 .pr_init = tcp6_init, 282 .pr_fasttimo = tcp_fasttimo, 283 .pr_drain = tcp_drainstub, 284 }, 285 #ifdef DCCP 286 { .pr_type = SOCK_CONN_DGRAM, 287 .pr_domain = &inet6domain, 288 .pr_protocol = IPPROTO_DCCP, 289 .pr_flags = PR_CONNREQUIRED|PR_ATOMIC|PR_LISTEN, 290 .pr_input = dccp6_input, 291 .pr_ctlinput = dccp6_ctlinput, 292 .pr_ctloutput = dccp_ctloutput, 293 .pr_usrreqs = &dccp6_usrreqs, 294 #ifndef INET 295 .pr_init = dccp_init, 296 #endif 297 }, 298 #endif /* DCCP */ 299 #ifdef SCTP 300 { .pr_type = SOCK_DGRAM, 301 .pr_domain = &inet6domain, 302 .pr_protocol = IPPROTO_SCTP, 303 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 304 .pr_input = sctp6_input, 305 .pr_ctlinput = sctp6_ctlinput, 306 .pr_ctloutput = sctp_ctloutput, 307 .pr_usrreqs = &sctp6_usrreqs, 308 .pr_drain = sctp_drain, 309 }, 310 { .pr_type = SOCK_SEQPACKET, 311 .pr_domain = &inet6domain, 312 .pr_protocol = IPPROTO_SCTP, 313 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 314 .pr_input = sctp6_input, 315 .pr_ctlinput = sctp6_ctlinput, 316 .pr_ctloutput = sctp_ctloutput, 317 .pr_drain = sctp_drain, 318 }, 319 { .pr_type = SOCK_STREAM, 320 .pr_domain = &inet6domain, 321 .pr_protocol = IPPROTO_SCTP, 322 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, 323 .pr_input = sctp6_input, 324 .pr_ctlinput = sctp6_ctlinput, 325 .pr_ctloutput = sctp_ctloutput, 326 .pr_drain = sctp_drain, 327 }, 328 #endif /* SCTP */ 329 { .pr_type = SOCK_RAW, 330 .pr_domain = &inet6domain, 331 .pr_protocol = IPPROTO_RAW, 332 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 333 .pr_input = rip6_input, 334 .pr_ctlinput = rip6_ctlinput, 335 .pr_ctloutput = rip6_ctloutput, 336 .pr_usrreqs = &rip6_usrreqs, 337 }, 338 #ifdef GATEWAY 339 { .pr_domain = &inet6domain, 340 .pr_protocol = IPPROTO_IPV6, 341 .pr_slowtimo = ip6flow_slowtimo, 342 .pr_init = ip6flow_poolinit, 343 }, 344 #endif /* GATEWAY */ 345 { .pr_type = SOCK_RAW, 346 .pr_domain = &inet6domain, 347 .pr_protocol = IPPROTO_DSTOPTS, 348 .pr_flags = PR_ATOMIC|PR_ADDR, 349 .pr_input = dest6_input, 350 }, 351 { .pr_type = SOCK_RAW, 352 .pr_domain = &inet6domain, 353 .pr_protocol = IPPROTO_ROUTING, 354 .pr_flags = PR_ATOMIC|PR_ADDR, 355 .pr_input = route6_input, 356 }, 357 { .pr_type = SOCK_RAW, 358 .pr_domain = &inet6domain, 359 .pr_protocol = IPPROTO_FRAGMENT, 360 .pr_flags = PR_ATOMIC|PR_ADDR, 361 .pr_input = frag6_input, 362 }, 363 #ifdef IPSEC 364 { .pr_type = SOCK_RAW, 365 .pr_domain = &inet6domain, 366 .pr_protocol = IPPROTO_AH, 367 .pr_flags = PR_ATOMIC|PR_ADDR, 368 .pr_input = ipsec6_common_input, 369 .pr_ctlinput = ah6_ctlinput, 370 }, 371 { .pr_type = SOCK_RAW, 372 .pr_domain = &inet6domain, 373 .pr_protocol = IPPROTO_ESP, 374 .pr_flags = PR_ATOMIC|PR_ADDR, 375 .pr_input = ipsec6_common_input, 376 .pr_ctlinput = esp6_ctlinput, 377 }, 378 { .pr_type = SOCK_RAW, 379 .pr_domain = &inet6domain, 380 .pr_protocol = IPPROTO_IPCOMP, 381 .pr_flags = PR_ATOMIC|PR_ADDR, 382 .pr_input = ipsec6_common_input, 383 }, 384 #endif /* IPSEC */ 385 #ifdef INET 386 { .pr_type = SOCK_RAW, 387 .pr_domain = &inet6domain, 388 .pr_protocol = IPPROTO_IPV4, 389 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 390 .pr_input = encap6_input, 391 .pr_ctlinput = encap6_ctlinput, 392 .pr_ctloutput = rip6_ctloutput, 393 .pr_usrreqs = &rip6_usrreqs, 394 .pr_init = encap_init, 395 }, 396 #endif 397 { .pr_type = SOCK_RAW, 398 .pr_domain = &inet6domain, 399 .pr_protocol = IPPROTO_IPV6, 400 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 401 .pr_input = encap6_input, 402 .pr_ctlinput = encap6_ctlinput, 403 .pr_ctloutput = rip6_ctloutput, 404 .pr_usrreqs = &rip6_usrreqs, 405 .pr_init = encap_init, 406 }, 407 #if NETHERIP > 0 408 { .pr_type = SOCK_RAW, 409 .pr_domain = &inet6domain, 410 .pr_protocol = IPPROTO_ETHERIP, 411 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 412 .pr_input = ip6_etherip_input, 413 .pr_ctlinput = rip6_ctlinput, 414 .pr_ctloutput = rip6_ctloutput, 415 .pr_usrreqs = &rip6_usrreqs, 416 }, 417 #endif 418 #if NCARP > 0 419 { .pr_type = SOCK_RAW, 420 .pr_domain = &inet6domain, 421 .pr_protocol = IPPROTO_CARP, 422 .pr_flags = PR_ATOMIC|PR_ADDR, 423 .pr_input = carp6_proto_input, 424 .pr_ctloutput = rip6_ctloutput, 425 .pr_usrreqs = &rip6_usrreqs, 426 }, 427 #endif /* NCARP */ 428 { .pr_type = SOCK_RAW, 429 .pr_domain = &inet6domain, 430 .pr_protocol = IPPROTO_L2TP, 431 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 432 .pr_input = encap6_input, 433 .pr_ctlinput = rip6_ctlinput, 434 .pr_ctloutput = rip6_ctloutput, 435 .pr_usrreqs = &rip6_usrreqs, 436 .pr_init = encap_init, 437 }, 438 { .pr_type = SOCK_RAW, 439 .pr_domain = &inet6domain, 440 .pr_protocol = IPPROTO_PIM, 441 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 442 .pr_input = pim6_input, 443 .pr_ctloutput = rip6_ctloutput, 444 .pr_usrreqs = &rip6_usrreqs, 445 .pr_init = pim6_init, 446 }, 447 /* raw wildcard */ 448 { .pr_type = SOCK_RAW, 449 .pr_domain = &inet6domain, 450 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 451 .pr_input = rip6_input, 452 .pr_ctloutput = rip6_ctloutput, 453 .pr_usrreqs = &rip6_usrreqs, 454 .pr_init = rip6_init, 455 }, 456 }; 457 458 static const struct sockaddr_in6 in6_any = { 459 .sin6_len = sizeof(in6_any) 460 , .sin6_family = AF_INET6 461 , .sin6_port = 0 462 , .sin6_flowinfo = 0 463 , .sin6_addr = IN6ADDR_ANY_INIT 464 , .sin6_scope_id = 0 465 }; 466 467 bool in6_present = false; 468 static void 469 in6_dom_init(void) 470 { 471 472 in6_present = true; 473 } 474 475 struct domain inet6domain = { 476 .dom_family = AF_INET6, .dom_name = "internet6", 477 .dom_init = in6_dom_init, .dom_externalize = NULL, .dom_dispose = NULL, 478 .dom_protosw = (const struct protosw *)inet6sw, 479 .dom_protoswNPROTOSW = (const struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 480 .dom_rtattach = rt_inithead, 481 .dom_rtoffset = offsetof(struct sockaddr_in6, sin6_addr) << 3, 482 .dom_maxrtkey = sizeof(struct ip_pack6), 483 .dom_if_up = in6_if_up, .dom_if_down = in6_if_down, 484 .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, 485 .dom_if_link_state_change = in6_if_link_state_change, 486 .dom_ifqueues = { NULL, NULL }, 487 .dom_link = { NULL }, 488 .dom_mowner = MOWNER_INIT("",""), 489 .dom_sa_cmpofs = offsetof(struct sockaddr_in6, sin6_addr), 490 .dom_sa_cmplen = sizeof(struct in6_addr), 491 .dom_sa_any = (const struct sockaddr *)&in6_any, 492 .dom_sockaddr_externalize = sockaddr_in6_externalize, 493 .dom_rtcache = LIST_HEAD_INITIALIZER(inet6domain.dom_rtcache) 494 }; 495 496 #if 0 497 int 498 sockaddr_in6_cmp(const struct sockaddr *lsa, const struct sockaddr *rsa) 499 { 500 uint_fast8_t len; 501 const uint_fast8_t addrofs = offsetof(struct sockaddr_in6, sin6_addr), 502 addrend = addrofs + sizeof(struct in6_addr); 503 int rc; 504 const struct sockaddr_in6 *lsin6, *rsin6; 505 506 lsin6 = satocsin6(lsa); 507 rsin6 = satocsin6(rsa); 508 509 len = MIN(addrend, MIN(lsin6->sin6_len, rsin6->sin6_len)); 510 511 if (len > addrofs && 512 (rc = memcmp(&lsin6->sin6_addr, &rsin6->sin6_addr, 513 len - addrofs)) != 0) 514 return rc; 515 516 return lsin6->sin6_len - rsin6->sin6_len; 517 } 518 #endif 519 520 /* 521 * Internet configuration info 522 */ 523 #ifndef IPV6FORWARDING 524 #ifdef GATEWAY6 525 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ 526 #else 527 #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ 528 #endif /* GATEWAY6 */ 529 #endif /* !IPV6FORWARDING */ 530 531 int ip6_forwarding = IPV6FORWARDING; /* act as router? */ 532 int ip6_sendredirects = 1; 533 int ip6_defhlim = IPV6_DEFHLIM; 534 int ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS; 535 int ip6_accept_rtadv = 0; /* "IPV6FORWARDING ? 0 : 1" is dangerous */ 536 int ip6_maxfragpackets = 200; 537 int ip6_maxfrags = 200; 538 int ip6_log_interval = 5; 539 int ip6_hdrnestlimit = 50; /* appropriate? */ 540 int ip6_dad_count = 1; /* DupAddrDetectionTransmits */ 541 int ip6_auto_flowlabel = 1; 542 int ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */ 543 int ip6_rr_prune = 5; /* router renumbering prefix 544 * walk list every 5 sec. */ 545 int ip6_mcast_pmtu = 0; /* enable pMTU discovery for multicast? */ 546 int ip6_v6only = 1; 547 int ip6_neighborgcthresh = 2048; /* Threshold # of NDP entries for GC */ 548 int ip6_maxifprefixes = 16; /* Max acceptable prefixes via RA per IF */ 549 int ip6_maxifdefrouters = 16; /* Max acceptable def routers via RA */ 550 int ip6_maxdynroutes = 4096; /* Max # of routes created via redirect */ 551 552 int ip6_keepfaith = 0; 553 time_t ip6_log_time = 0; 554 int ip6_rtadv_maxroutes = 100; /* (arbitrary) initial maximum number of 555 * routes via rtadv expected to be 556 * significantly larger than common use. 557 * if you need to count: 3 extra initial 558 * routes, plus 1 per interface after the 559 * first one, then one per non-linklocal 560 * prefix */ 561 562 /* icmp6 */ 563 /* 564 * BSDI4 defines these variables in in_proto.c... 565 * XXX: what if we don't define INET? Should we define pmtu6_expire 566 * or so? (jinmei (at) kame.net 19990310) 567 */ 568 int pmtu_expire = 60*10; 569 570 /* raw IP6 parameters */ 571 /* 572 * Nominal space allocated to a raw ip socket. 573 */ 574 #define RIPV6SNDQ 8192 575 #define RIPV6RCVQ 8192 576 577 u_long rip6_sendspace = RIPV6SNDQ; 578 u_long rip6_recvspace = RIPV6RCVQ; 579 580 /* ICMPV6 parameters */ 581 int icmp6_rediraccept = 1; /* accept and process redirects */ 582 int icmp6_redirtimeout = 10 * 60; /* 10 minutes */ 583 int icmp6errppslim = 100; /* 100pps */ 584 int icmp6_nodeinfo = 1; /* enable/disable NI response */ 585
Indexes created Mon Oct 20 20:10:13 GMT 2025